Since kwin-3.5.9 (it worked fine in 3.5.8) the attached upstream bug is back (see url attached). I believe it is due to the gentoo specific kdebase-kwin-only-seli-xinerama.patch since it seems to revert the changes that were discussed in the upstream bug report.
Steps to Reproduce:
1. Use multihead displays with two different vertical resolutions, with a separate kwin on both screens (no xinerama)
2. Open a window on the screen with lower vertical resolution
3. Maximize the window.
The window will be partially hidden by the panel at the bottom of the screen
The window should stop at the panel when maximized, not be hidden under it.
Does this still happen in 3.5.10?
Nope, can't seem to reproduce it with kwin-3.5.10, will close when 3.5.10 goes stable?
3.5.10 is about to be stable, i opened the bug and we are waiting for the ARCH teams to do it. More info bug 271889. Thanks